This bug was fixed in the package qtdeclarative-opensource-src -
5.9.5-0ubuntu1.1
---------------
qtdeclarative-opensource-src (5.9.5-0ubuntu1.1) bionic; urgency=medium
* Cherry-pick upstream patch to fix memory leak in image slideshows in
KDE Plasma (LP: #1761016).
-- Dmitry Shachnev <mity...@ubuntu.com> Sun, 26 Aug 2018 14:32:09
+0300
** Changed in: qtdeclarative-opensource-src (Ubuntu Bionic)
Status: Fix Committed => Fix Released
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https://bugs.launchpad.net/bugs/1761016
Title:
cherry-pick https://codereview.qt-project.org/#/c/224684/ to fix
image slideshows in KDE Plasma
Status in qtdeclarative-opensource-src package in Ubuntu:
Fix Released
Status in qtdeclarative-opensource-src source package in Bionic:
Fix Released
Bug description:
[Impact]
* Due to a Qt bug, using an image slideshow for the wallpaper causes a
memory leak that eventually causes the system to freeze. The severity of the
leak is proportional to the speed with which images are changed in the
slideshow.
* Given the popularity of the image slideshow wallpaper feature, this is a
high-profile, easily reproducible issue.
* See https://bugs.kde.org/show_bug.cgi?id=368838 and
https://codereview.qt-project.org/#/c/224684/
* An attempt was made to backport the fix prior to Bionic's release,
but this was overlooked or unsuccessful (see the history here). As a
result, it now needs to be done as an SRU.
[Test Case]
* Use KDE Plasma
* Right-click on the desktop and choose "Configure Desktop"
* Change the wallpaper type to "Slideshow" and choose a folder full of images
* Click Apply
* Wait a few days; Plasma will eventually totally freeze
[Regression Potential]
* Regressions are unlikely given that the specific backport patch has
been well-tested by many in
https://bugs.kde.org/show_bug.cgi?id=368838, and the actual code fix
in Qt was released to users in Qt 5.11 months ago.
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